FilterStringAsync, TextService, and GetNonChatStringForUserAsync?

I'm currently developing a game that allows you to name your character. According to ROBLOX, I should filter scripts that will allow players to name things for all players to see from TextBox.

My issue is that **TextService appears as nil **when I'm playing my game outside of studio. It is not in Studio - when I print it in the studio it returns "TextService".

I read on the wiki that if GetService() returns nil then it must be because:

This function will return nil if the className parameter is an existing class, but the class is not a service.

If you attempt to fetch a service that is present under another ServiceProvider, an error will be thrown stating that the "singleton serviceName already exists".

However, I am certain that TextService is a service and not some other class and for the second explanation...well I'm not sure if I fully understand but I doubt it's whats happening with my script.

I tried LocalScript and Script but both don't work. Script says TextService is nil and LocalScript says that I must use a Script.

I also tried putting this script into ServerScriptService and getting my variables from TextBox with the help of a BindableFunction, still the exact same error.

player = nil
id = nil
textService = game:GetService("TextService")


function verifyName()
	--get player
	player = (game.Players:GetChildren())[1] --1 player server, therefore should be the first and only child
	id = player.UserId
	--
	local rpName = script.Parent.Text
	--Chat filter
	local filtering = textService:FilterStringAsync(rpName, id)
	local filteredName = filtering:GetNonChatStringForUserAsync(id)
	--UX/UI
	script.Parent.Text = "RP Name: " .. filteredName
end
script.Parent.FocusLost:connect(verifyName)

This script's ancestry is: -TextBox -Frame -Frame -Frame -ScreenGui -PlayerGui

Any suggestions on how I should approach this? Thanks!